Multicolor Live-Cell mRNA Imaging Using RNA-Regulated Destabilization Domains

Area of Science:

• Molecular Biology
• Cell Biology
• Genetics

Background:

• Messenger RNA (mRNA) molecules are essential for protein synthesis and cellular function.
• Real-time imaging of mRNA dynamics provides insights into gene expression regulation.
• Current methods may have limitations in simultaneously visualizing multiple mRNA species.

Purpose of the Study:

• To develop a novel method for simultaneous, real-time imaging of multiple mRNAs in living cells.
• To leverage RNA-regulated destabilization domains for selective mRNA visualization.
• To enable deeper understanding of spatiotemporal RNA dynamics and gene expression.

Main Methods:

• Engineered three distinct mRNA molecules with specific RNA imaging tags.
• Utilized RNA-regulated destabilization domains fused to fluorescent proteins.
• Achieved selective fluorescence activation upon tag-domain binding for mRNA imaging.

Main Results:

• Demonstrated the successful simultaneous imaging of multiple engineered mRNAs in living cells.
• Showcased the specificity of RNA imaging tags binding to their cognate destabilization domains.
• Validated the selective activation of fluorescence correlated with specific mRNA localization and dynamics.

Conclusions:

• The developed method enables simultaneous multicolor imaging of mRNAs in living cells.
• This technique offers a powerful tool for studying RNA biology and gene expression.
• Provides new avenues for investigating RNA localization, transport, and function in real-time.